60		Men with Steel Faces (Sci-Fi, Western, 1940)
32		Death Collector (Action, Sci-Fi, Western, 1988)
31		It's Great to Be Alive (Comedy, Musical, Sci-Fi, 1933)
30		The Day the Earth Stood Still (Drama, Sci-Fi, 1951)
29		Rocky Horror Show Live (Comedy, Musical, Sci-Fi, 2015)
29		Undersea Kingdom (Sci-Fi, Adventure, 1936)
29		THX 1138 (Crime, Drama, Sci-Fi, 1971)
29		The Invisible Ray (Horror, Sci-Fi, Thriller, 1936)
27		The American Astronaut (Musical, Comedy, Sci-Fi, 2001)
27		Carolina Cannonball (Comedy, Musical, Sci-Fi, 1955)
27		A Foundling (Sci-Fi, Western, 2010)
27		The Valley of Gwangi (Western, Sci-Fi, Thriller, 1969)
27		The Apple (Music, Musical, Sci-Fi, 1980)
27		Toomorrow (Comedy, Musical, Sci-Fi, 1970)
27		Voyage of the Rock Aliens (Musical, Sci-Fi, Comedy, 1984)
27		Big Meat Eater (Comedy, Musical, Sci-Fi, 1982)
27		Swine (Action, Sci-Fi, Western, 2012)
27		Strangers in Paradise (Comedy, Musical, Sci-Fi, 1984)
27		Sons of Steel (Comedy, Musical, Sci-Fi, 1988)
27		Repo! The Genetic Opera (Horror, Musical, Sci-Fi, 2008)
26		Man Made Monster (Drama, Horror, Sci-Fi, 1941)
25		Forbidden Planet (Action, Adventure, Sci-Fi, 1956)
25		Rise of the Planet of the Apes (Action, Drama, Sci-Fi, 2011)
25		Darkest Africa (Action, Adventure, Romance, Sci-Fi, 1936)
24		Chandu the Magician (Action, Adventure, Fantasy, Sci-Fi, 1932)
24		The Maze Runner (Action, Mystery, Sci-Fi, 2014)
24		Cloud Atlas (Drama, Sci-Fi, 2012)
24		Island of Lost Souls (Horror, Sci-Fi, 1932)
24		Buck Rogers (Romance, Sci-Fi, 1977)
24		The Colossus of New York (Horror, Sci-Fi, 1958)
24		Devil Girl from Mars (Sci-Fi, 1954)
24		The Devil-Doll (Sci-Fi, Horror, 1936)
24		Sleeper (Comedy, Sci-Fi, 1973)
24		Beneath the Planet of the Apes (Action, Adventure, Sci-Fi, 1970)
24		The Walking Dead (Crime, Horror, Sci-Fi, 1936)
24		Battlestar Galactica (Action, Adventure, Sci-Fi, 1978)
24		Logan's Run (Action, Adventure, Sci-Fi, 1976)
23		Flash Gordon's Trip to Mars (Action, Adventure, Sci-Fi, 1938)
23		Dr. Cyclops (Adventure, Drama, Horror, Sci-Fi, 1940)
23		Just Imagine (Comedy, Fantasy, Musical, Sci-Fi, 1930)
23		Star Wars: Episode V - The Empire Strikes Back (Action, Adventure, Fantasy, Sci-Fi, 1980)
22		The Phantom Creeps (Sci-Fi, 1939)
22		Interstellar (Adventure, Drama, Sci-Fi, 2014)
21		The Terminator (Action, Sci-Fi, 1984)
21		Mad Max: Fury Road (Action, Adventure, Sci-Fi, 2015)

Notes: Movies similar to The Phantom Empire, Movies like The Phantom Empire, Musical, Sci-Fi, Western, Otto Brower, B. Reeves Eason, Gene Autry, Frankie Darro, Betsy King Ross, Dorothy Christy, SF, Science Fiction, SciFi, Sci Fi, Films, Video, Movie Similarities